i-v iii iin iio iir iis in- ini inn ino inr ins inv io- ioi ion ioo ior ios iov ir- iri irn iro irr irs irv is- isi isn iso isr iss isv ivi ivo ivr ivs ivv n-i nii nin nio nir nis niv nni nnn nno nns nnv no- noi non noo nor nos nov nri nrn nro nrr nrs nrv nsi nsn nso nsr nss nsv nvi nvn nvv o-i oii oin oio oir ois oiv on- oni onn ono onr ons oo- ooi oon ooo oor oos oov or- ori orn oro orr ors orv os- osi osn oso osr oss osv ov- ovi ovo ovs ovv rii rin rio rir ris riv rni rnn rno rnr rns rnv roi ron roo ror ros rov rri rrn rrr rrs rsi rsn rso rsr rss rsv rvi rvn rvo rvr rvs rvv sii sin sio sir sis siv sni snn sno snr sns snv soi son soo sor sos sov sr- sri srn sro srr srs srv ss- ssi ssn sso ssr sss ssv svi svn svo svr svs svv vi- vii vin vio vir vis viv vn- vni vno vnr vns vnv voi von voo vor vos vov vri vrn vrr vrs vsi vsn vso vsr vss vsv vvi vvo vvr vvs vvv